Her Majesty's Royal Space Armada

A macro-oriented RTS that trades twitchy gameplay, APM, and worker micromanagement for thoughtful gameplay, epic fleets, and foofy nobles with their convoluted feudal politics.

Full source is available here: (2013 era Unity; forgot which version; unlikely to work in modern Unity versions without modification thanks to the use of Javascript)
https://github.com/nihilocrat/HerMajestysRoyalSpaceArmada